Fill in the blank so that 81x2+_
x+81 is a perfect square trinomial.
81x²+_____
x+81
1 answer:
the blank is 162
since 81 and 81 are both perfect squares the middle term (blank) will be the product of their roots times 2
√81=9
√81 =9
9 x 9 x 2
= 162
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